BP Fluor 647 is a bright green-fluorescent dye optimal for use with the 633, 650 nm Argon laser. The dye is water soluble and pH-insensitive from pH 4 to pH 10. The dye has 4 sulfonate groups making it high water soluble and less aggregation in the aqueous solution. BP Fluor 647 647 is used for protein and antibody labeling, or nucleic acid applications with high labeling density.